bonjour svp C'est pour demain merci d'avance ​

Bonjour,

A= 1/2 + 5/8

= 4/8 + 5/8

= 9/8

B= 1/6 - 20/6

= 19/6

C=

(-6/8 +7/8)  * ( -2/15 - 3/15)

= 1/8 * -5/15

= 1/8 * - 1/3

= -124

D=

(2/14 -3/14) * (-6/4)

= -1/14 *  -3/2

= 3/ 28

E=

7/15 +3/10 = 14/30 + 9/30 = 23/30

23/30 *  1/2

= 23/ 15

F=

1/6+3/4 = 2/12 + 9/12 = 11/12

1/6 -1/4 = 2/12 - 3/12 =  -1/12

(11/12) /(-1/12)

=  11/12* -12 = -132/12 = -11